Hardware Spec Index

Brontix FN-4921 Ultra 140mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN4921-ULTRA · Released 2021 · Updated 2026-10-21

Key facts

Benchmark index858 (Case Fans scale)
Category rank#34,550
Street price$29
Power4 W
Performance per dollar29.59
Released2021

Specifications

BrandBrontix
ModelBrontix FN-4921 Ultra
Size140 × 140 × 25 mm
Speed200–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise32 dBA
BearingMagnetic levitation
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4921 Ultra 140mm PWM ARGB Case Fan”, https://vextor7.com/item/4879947 (accessed 2026-10-21).